support arm64 vdso functions with a frame #195
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depending on gcc version and optimization level the kernel vDSO may or may not contain simple calls with frame. Accommodate for this.
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I need to double check if this actually works as expected. The frame finding works, but the stack delta generated may be incorrect. I'll try to get a proper coredump test case for this. |
Good point, forgot to mention that I can't test this atm. |
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So turns out this was quite difficult for me too. My ARM64 box runs kernel where the vDSO does not have this. Ubuntu kernels do. So I ended up running Ubuntu kernel on qemu-system-aarch64. Due to that setup being slow, I ended up just creating a coredump in the old style format (core only, no associated original ELF files). I'll need to see if I can convert it still to the new style by hand, or alternatively just dump it in in the old format. In any case, I got the stack delta wrong, it is fixed now and should be working. |
Add logic to unwind through vDSO functions with frame.